ec/google/chromeec: Add new wrappers for host commands

Add new functions to get (from the EC):
1) The number of USB-PD ports
2) The capabilities of each port (EC_CMD_GET_PD_PORT_CAPS)

BUG=b:146506369
BRANCH=none
TEST=Instrumented calls to these and verified the data

Change-Id: I57edbe1592cd28b005f01679ef8a8b5de3e1f586
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38540
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/ec/google/chromeec/ec.c

@@ -15,16 +15,18 @@
 
 #include <stdint.h>
 #include <string.h>
-#include <cbmem.h>
-#include <console/console.h>
 #include <assert.h>
 #include <bootmode.h>
 #include <bootstate.h>
+#include <cbmem.h>
+#include <console/console.h>
 #include <delay.h>
+#include <device/device.h>
+#include <device/path.h>
 #include <elog.h>
 #include <rtc.h>
-#include <stdlib.h>
 #include <security/vboot/vboot_common.h>
+#include <stdlib.h>
 #include <timer.h>
 
 #include "chip.h"
@@ -1419,6 +1421,57 @@ enum ec_current_image google_chromeec_get_current_image(void)
 	return ec_image_type;
 }
 
+int google_chromeec_get_num_pd_ports(int *num_ports)
+{
+	struct ec_response_charge_port_count resp = {};
+	struct chromeec_command cmd = {
+		.cmd_code = EC_CMD_CHARGE_PORT_COUNT,
+		.cmd_version = 0,
+		.cmd_data_out = &resp,
+		.cmd_size_in = 0,
+		.cmd_size_out = sizeof(resp),
+		.cmd_dev_index = 0,
+	};
+	int rv;
+
+	rv = google_chromeec_command(&cmd);
+	if (rv)
+		return rv;
+
+	*num_ports = resp.port_count;
+	return 0;
+}
+
+int google_chromeec_get_pd_port_caps(int port,
+				struct usb_pd_port_caps *port_caps)
+{
+	struct ec_params_get_pd_port_caps params = {
+		.port = port,
+	};
+	struct ec_response_get_pd_port_caps resp = {};
+	struct chromeec_command cmd = {
+		.cmd_code = EC_CMD_GET_PD_PORT_CAPS,
+		.cmd_version = 0,
+		.cmd_data_in = &params,
+		.cmd_size_in = sizeof(params),
+		.cmd_data_out = &resp,
+		.cmd_size_out = sizeof(resp),
+		.cmd_dev_index = 0,
+	};
+	int rv;
+
+	rv = google_chromeec_command(&cmd);
+	if (rv)
+		return rv;
+
+	port_caps->power_role_cap = resp.pd_power_role_cap;
+	port_caps->try_power_role_cap = resp.pd_try_power_role_cap;
+	port_caps->data_role_cap = resp.pd_data_role_cap;
+	port_caps->port_location = resp.pd_port_location;
+
+	return 0;
+}
+
 void google_chromeec_init(void)
 {
 	google_chromeec_log_uptimeinfo();

src/ec/google/chromeec/ec.h

@@ -299,4 +299,34 @@ int google_chromeec_get_protocol_info(
  */
 int google_chromeec_get_cmd_versions(int command, uint32_t *pmask);
 
+/**
+ * Get number of PD-capable USB ports from EC.
+ *
+ * @param *num_ports	If successful, num_ports is the number
+ *			of PD-capable USB ports according to the EC.
+ * @return		0 on success, -1 on error
+ */
+int google_chromeec_get_num_pd_ports(int *num_ports);
+
+/* Structure representing the capabilities of a USB-PD port */
+struct usb_pd_port_caps {
+	enum ec_pd_power_role_caps power_role_cap;
+	enum ec_pd_try_power_role_caps try_power_role_cap;
+	enum ec_pd_data_role_caps data_role_cap;
+	enum ec_pd_port_location port_location;
+};
+
+/**
+ * Get role-based capabilities for a USB-PD port
+ *
+ * @param port			Which port to get information about
+ * @param *power_role_cap	The power-role capabillity of the port
+ * @param *try_power_role_cap	The Try-power-role capability of the port
+ * @param *data_role_cap	The data role capability of the port
+ * @param *port_location	Location of the port on the device
+ * @return			0 on success, -1 on error
+ */
+int google_chromeec_get_pd_port_caps(int port,
+				struct usb_pd_port_caps *port_caps);
+
 #endif /* _EC_GOOGLE_CHROMEEC_EC_H */